The aluminun hauler bed with a 60 or 90 auto transfer fuel tank, rhino lined, installed on truck, painted to match is close to 20K IIRC.
I'll have to find my estimate to see what was added on the base price.
If you have an interest in something like this your better off ordering it new or starting with a cab/chassis.

The value of my near perfect condition DRW bed is 12-1500.